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Questions and Answers
Which point group do perfectly symmetrical tetrahedral molecules belong to?
Which point group do perfectly symmetrical tetrahedral molecules belong to?
- C2v
- D2h
- Td (correct)
- Oh
What is the bond angle in a tetrahedral molecular geometry?
What is the bond angle in a tetrahedral molecular geometry?
- 109.5° (correct)
- 120°
- 90°
- 105°
How can the bond angle for a symmetric tetrahedral molecule be calculated?
How can the bond angle for a symmetric tetrahedral molecule be calculated?
- By taking the average of the bond angles of the substituents
- Using the cross product of two vectors
- By using the Pythagorean theorem
- Using the dot product of two vectors (correct)
What is the point group of most tetrahedral molecules with lower symmetry?
What is the point group of most tetrahedral molecules with lower symmetry?
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Can tetrahedral molecules be chiral?
Can tetrahedral molecules be chiral?
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Study Notes
Tetrahedral Molecular Symmetry
- Perfectly symmetrical tetrahedral molecules belong to the point group Td.
- The bond angle in a tetrahedral molecular geometry is approximately 109.5 degrees.
- The bond angle for a symmetric tetrahedral molecule can be calculated using geometry principles related to spatial arrangement and steric effects.
Symmetry Variations in Tetrahedral Molecules
- Most tetrahedral molecules with lower symmetry fall under the point group C3v, indicating a three-fold rotational axis and vertical mirror planes.
Chirality in Tetrahedral Molecules
- Tetrahedral molecules can be chiral if they have four different substituents or groups attached to the central atom, resulting in non-superimposable mirror images.
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